package service;

import po.CourseStudent;


import java.util.List;

public interface CourseStudentService {
   // public List<Course_Student> queryAll(Integer sid);
    public void insert(CourseStudent courseStudent);
    public  void delete(CourseStudent courseStudent);
    public  Integer  haveChooseNumber(Integer id);
    public boolean ifHaveChoose(Integer cid,Integer sid);
    public  CourseStudent queryOneCourseStudent(Integer cid,Integer sid);
}
